Dipole moment of the lowest Π bending state of (HCN)2

A. Grushow, W. A. Burns, K. R. Leopold

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The dipole moment of the lowest Π bending state of (HCN)2 has been determined by tunable far-infrared Stark spectroscopy to be 6.023(31) D. This represents a reduction in dipole moment of 0.54(5) D relative to the ground state, which is over five times too large for simple harmonic oscillations of uncoupled rods. Although qualitative comparison with related systems suggests the possibility of a secondary minimum near the T-shaped configuration, electrostatic modeling does not support the existence of such a feature.

Original languageEnglish (US)
Pages (from-to)335-345
Number of pages11
JournalJournal of molecular spectroscopy
Issue number2
StatePublished - Apr 1995


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